scholarly journals Oxytetracycline Mineralization inside a UV/H2O2 System of Advanced Oxidation Processes: Inorganic By-Product

2021 ◽  
Vol 16 (2) ◽  
pp. 302-309
Author(s):  
Anisa Ur Rahmah ◽  
Sabtanti Harimurti ◽  
Kiki Adi Kurnia ◽  
Abdul Aziz Omar ◽  
Thanabalan Murugesan
Keyword(s):  
Advanced Oxidation Processes ◽  
Chloride Ions ◽  
The Body ◽  
Photochemical Degradation ◽  
Water Stream ◽  
Agricultural Industry ◽  
Oxidation Processes ◽  
By Products ◽  
Open Access Article ◽  
H2o2 System

Oxytetracycline (OTC) was widely used antibiotic in agricultural industry. However, most of them were secreted from the body and entered the water stream, due to low absorption. The occurrence of the antibiotics in water stream may led to serious health hazards. Hence, finding the effective method that capable to achieve total mineralization of antibiotic-contaminated wastewater, followed by the production of benign inorganic and organic by-product, was necessarily deemed. Photochemical degradation method, such as: UV/H2O2 system, was capable to achieve total mineralization of OTC at its optimized condition. In this paper, inorganic by-products of OTC mineralization inside a UV/H2O2 system at its optimum condition were analyzed. The presence of nitrate, ammonium, chloride ions, and chlorine were detected at the sample solution after mineralization. The presence of these inorganic by-product has proven that the experimental setup chosen was capable to achieve total mineralization. In addition, possible routes of the inorganic by-products detachment from the OTC’s structure, were also presented. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

Impact of Chloride Ions on UV/H2O2 and UV/Persulfate Advanced Oxidation Processes

2018 ◽  
Vol 52 (13) ◽  
pp. 7380-7389 ◽  
Author(s):  
Weiqiu Zhang ◽  
Shiqing Zhou ◽  
Julong Sun ◽  
Xiaoyang Meng ◽  
Jinming Luo ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Chloride Ions ◽  
Oxidation Processes

scholarly journals Toxicity Reduction of Industrial and Municipal Wastewater by Advanced Oxidation Processes (Photo-Fenton, UVC/H2O2, Electro-Fenton and Galvanic Fenton): A Review

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 612 ◽  
Author(s):  
Juan José Rueda-Márquez ◽  
Irina Levchuk ◽  
Manuel Manzano ◽  
Mika Sillanpää
Keyword(s):  
Cost Estimation ◽  
Advanced Oxidation Processes ◽  
Municipal Wastewater ◽  
High Efficiency ◽  
Advanced Oxidation ◽  
Toxicity Assessment ◽  
Operational Conditions ◽  
Oxidation Processes ◽  
Real Wastewater ◽  
By Products

The application of Fenton-based advanced oxidation processes (AOPs), such as photo-Fenton or electro-Fenton for wastewater treatment have been extensively studied in recent decades due to its high efficiency for the decomposition of persistent organic pollutants. Usually Fenton-based AOPs are used for the degradation of targeted pollutant or group of pollutants, which often leads to the formation of toxic by-products possessing a potential environmental risk. In this work, we have collected and reviewed recent findings regarding the feasibility of Fenton-based AOPs (photo-Fenton, UVC/H2O2, electro-Fenton and galvanic Fenton) for the detoxification of real municipal and industrial wastewaters. More specifically, operational conditions, relevance and suitability of different bioassays for the toxicity assessment of various wastewater types, cost estimation, all of which compose current challenges for the application of these AOPs for real wastewater detoxification are discussed.

Combination of advanced oxidation processes and gas absorption for the treatment of chlorinated solvents in waste gases

2001 ◽  
Vol 44 (9) ◽  
pp. 173-180 ◽  
Author(s):  
J. Dewulf ◽  
H. Van Langenhove ◽  
E. De Smedt ◽  
S. Geuens
Keyword(s):  
Advanced Oxidation Processes ◽  
Bubble Column ◽  
Chlorinated Solvents ◽  
Advanced Oxidation ◽  
Chemical Oxidation ◽  
Chloride Ions ◽  
Gas Absorption ◽  
Oh Radicals ◽  
Chlorinated Organic Compounds ◽  
Oxidation Processes

Treatment of chlorinated organic compounds in waste gases is difficult because of several reasons: these compounds are dioxin precursors when incinerated, and also biological treatment is difficult because of a limited number of suitable microbial degradation pathways. On the other hand, since the 1990s, a new generation of chemical oxidation techniques has been introduced in water treatment. Advanced Oxidation Processes (AOPs) are based on a combination of UV/H2O2, UV/O3 or H2O2/O3. The combinations result in the generation of OH-radicals, which subsequently attack the organic pollutants. In this work, the treatment of a gas stream (240 L/h) loaded with 20-40 ppmv trichloroethylene (TCE) is presented. Therefore, a combination of an absorption process in a bubble column with a liquid H2O2/O3 initiated oxidation, was investigated. Removal efficiencies, depending on the dosed H2O2 and O3, up to 94% were found. The production of chloride ions was investigated: the Cl-atoms from the removed TCE could be found back as chloride ions. Next to the experimental work, attention was paid to the mechanisms taking place in the proposed concept. Here, a simulation model was developed, considering gas/liquid mass transfer of TCE and ozone, axial liquid dispersion, advective gas and liquid transport and about 29 chemical reaction steps. The modelling allowed a better understanding of the technique and gives insight in its possibilities and limitations. Finally, it can be concluded that the proposed technique shows interesting perspectives: it is able to transform chlorine in chlorinated solvents into chloride ions effectively at ambient temperature conditions.

scholarly journals Activated Carbon and Ozone to Reduce Simazine in Water

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2900
Author(s):  
Alejandro Aldeguer Esquerdo ◽  
Pedro José Varo Galvañ ◽  
Irene Sentana Gadea ◽  
Daniel Prats Rico
Keyword(s):  
Activated Carbon ◽  
Contact Time ◽  
Advanced Oxidation Processes ◽  
Powdered Activated Carbon ◽  
Carbon Powder ◽  
Combined Treatments ◽  
Initial Concentration ◽  
Oxidation Processes ◽  
By Products ◽  
Granulated Activated Carbon

In this study, the reduction of the pesticide simazine at an initial concentration of 0.7 mg L−1 in water has been investigated using two different technologies: adsorption with powdered and granulated activated carbon, advanced oxidation processes with ozone and finally, the combination of both technologies. The results obtained for a carbon dose of 16 mg L−1 show that powdered activated carbon, with contact times of 60 min, obtained 81% of reduction and in 24 h 92%, while granulated activated carbon at 60 min obtained a reduction of 2%, rising to 34% after 24 h of contact time. Therefore, powdered activated carbon achieves better reductions compared to granulated; when ozone was applied at a dose of 19.7 mg L−1, with a reaction time of 18 min, a reduction of 93% was obtained, achieving a better reduction in less time than with adsorption treatments; however, during oxidation, by-products of simazine were produced. In the combined treatments, with the same doses of carbon and ozone mentioned above, the treatment that starts with ozone followed by activated carbon powder is recommended due to the adsorption in the last phase reaching a 90% reduction of the simazine and its by-products in 38 min of time.

Effect of advanced oxidation processes on nonylphenol removal with respect to chlorination in drinking water treatment

2010 ◽  
Vol 10 (1) ◽  
pp. 51-57 ◽  
Author(s):  
R. Mosteo ◽  
N. Miguel ◽  
P. Ormad Maria ◽  
J. L. Ovelleiro
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Natural Water ◽  
Advanced Oxidation Processes ◽  
Drinking Water Treatment ◽  
Advanced Oxidation ◽  
Total Removal ◽  
Oxidation Processes ◽  
By Products

Any nonylphenol compounds found in water have to be removed since they are endocrine disruptors. In this study, natural water from the river Ebro fortified with nonylphenol compounds (4n-nonylphenol and technical nonylphenol) is used as a sample in order to simulate a real situation in drinking water treatment plants. The aim is to compare conventional disinfection with advanced oxidation processes (O3, O3/H2O2, O3/TiO2 and O3/H2O2/TiO2) used for the removal of nonylphenol compounds present in natural water. Furthermore, a study is carried out of the by-products (THMs) generated as a consequence of the presence of natural organic matter. Preoxidation by chlorine completely oxidizes 4n-nonylphenol and technical nonylphenol. It can be seen that the best of the advanced oxidation processes is the O3/H2O2, achieving an average oxidation of 55%, although the differences among the processes were not very significant. Furthermore, the use of post-chlorination guarantees the total removal of nonylphenol compounds.

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